Cutting-machine.



Patented Sept. 29, 1908.

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ROBERT F. COLEMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO J. W. RINGROSE NET COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VAN IA.

' CUTTING-MACHIN E Specification of Letters Patent.

Patented Sept. 29, 1908.

may be formed more quickly and inexpensively than has hitherto been possible. I further desire to provide a machine of the above noted type in which strips of square section may be fed to cutter knives turning at a high speed and so coacting with one another as to remove the corners of said strips so as to form strips of circular section. These objects I attain as hereinafter set forth, reference being had to the accompanydrawings, in which Figure 1, is a front elevation, partly in vertical section, of the mechanism comprising my invention Fig. 2, is aside elevation of the mechanism shown in Fig. 1, and Fig. 3, is a pers ective view.of one of the cutters.

In t e above drawings A and A are a pair of substantially parallel shafts geared together by pinions a and a of which one is riven from any desired source of power. These shafts are mounted in bearings, not shown, and carry upon adjacent ends a pair of cutters b and b', shaped as indicated. Each cutter may be described `as consisting of a wheel body provided with a number of substantially radial slots b2 between each two of which is a segmental section havinga projectin tooth b3 in which is formed a circumferent1ally extending slot of semi-circular section. These teeth cannot be of greater length than half the length of the segment of which they form a part and each one has its front or cutting edge immediately adjacent to one of the slots b2 so that as the edges def fined by the radial faces of the semi-circular grooves b4, become dulled or nicked, they may be made sharp by the use'of an abrading wheel in the manner well known in the art.

The two cutters l) and b are so mounted upon their respective shafts that the teeth of one come opposite the space between a tooth and a slot on the other; `the proportions being such that the teeth of the two vcutters together dene a passage of circular outline.

lother feeding wheel.

In front of the two cutters, I mount two substantially vertical shafts C and C geared together by pinions c and c driven from any suitable source of power.

Each` shaft is provided with a milled feeding wheel c2, and while the shaft Cis mounted in fixed bearings, as shown, the shaft C is hung from its upper bearing c3 in such manner as to permit its lower end, upon which is mounted its feeding wheel c2, to be moved to a limited extent toward and from the This lower end of the shaft C is normally pressed toward the other shaft in any desired manner, such as by ymeans of a spring c, and some form of stop is usually employed to prevent said two wheels from actually coming in contact with each other.

Under operating conditions, the shafts A and A are turned at a high speed, as indicated by arrows in Fig. 2, while the shafts C and C are also driven, but at a much slower speed. A strip of material D of square section is then fed between the wheels c2 and as soon as this has entered for a sufficient distance it is engaged by the two cutters l) and b. The edges of the teeth of said cutters cut. off its corners so that it emerges from the machine circular in section, as indicated at d. The feed wheels c2, by turning at a relatively slow speed, prevent the strip from being drawn through the machine by the cutter, as they compel it to pass at a predetermined rate so that said cutters are enabled to properly form it.

vWhile I have shown cutters designed to form a strip of circular section, it is obvious that without in any way departin from my invention their circumferentia rooves may be given such a form as to prouce strips of any of a number of different sections.

I claim as my invention:

1. A machine for operating upon a strip of leather having two cutters co-acting to deline a passage of predetermined form, and feedingfmechanism for retarding the passage of a strip of material through said cutters, substantially as described.

2. A machine for operating upon a strip of leather having a pair of cutters together deiining a passage of predetermined form and driven at a relatively high speed, with a air of feed wheels turning at a speed less than that of the cutters for retarding the passage of the strip of material through said cutters, substantially as described.

3. The combination in a machine for operating upon a strip of leather, of a pair of cutters co-acting to define a passage of predetermined form, feed mechanism for retarding the movement of the strip of material under the action of the cutters, said feed mechanism including two shafts, each having a milled Wheel, one of said shafts being mounted so as to be movable toward and from the other, substantially as described.

4. The combination in a machine for operating upon a strip of leather, of a pair of cutters having inter-meshing teeth defining a passage of predetermined. form, feed. mechanism for regulating the passage of material through said cutters, the same including two substantially parallel shafts, each having a feed Wheel, and means for regulating the movement of said shafts to cause the feed Wheels to retard the passage of a strip of material between the cutters one of said shafts being yieldingly pressed toward the other, substantiallyT as described.

5. A machine having mechanism for controlling the feeding of a strip of material, and two coacting cutters placed to operate upon the material supplied by said mechanism, said cutters having intermeshing teeth and substantially flat surfaces alternating therewith, said surfaces of one cutter being ar ranged to be opposite the ends of the teeth of the other cutter.

6. A machine having two cutters provided with intermeshing teeth and driven at a relatively high speed, said cutters each having substantially flat portions alternating with its teeth, and the teeth of each cutter being provided with a circumferential groove, the cutters having supporting means whereby the teeth of one cutter are caused to come opposite the flat surfaces of the other, said surfaces being arranged to support a piece of strip material directly opposite the point at which it is acted upon by the teeth of the other cutter.

7. A machine for operating upon a strip of leather having cutters co-acting to de'line a passage of predetermined. form,. means for driving the cutters, andA feeding means placed to act on a strip of material before it is engaged by the cutters and tending to hold back on said material, 'substantially as described. l

In testimony whereof, l have signed my name to this specification, in the presence of two subscribing witnesses.

ROBERT F. COLEMAN.

litnessesz VILLIAM E. BRADLEY, WM. A. BARR. 

